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chenkexin

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  • Friend of: 9 users
  • Last visit: 10 hours ago
  • Registered: 12 months ago
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173 problems
solved for all time
173 problems
solved for the last year
40 problems
solved for the last month
11 days
in a row max.
11 days
in a row for the last year
3 days
in a row for the last month